alleryA gas absorbs 500 J of heat and does 200 J of work. Change in internal energy:
A-300 J
B-700 J
C+300 J
D+700 J
Answer & Solution
Correct answer: C. +300 J
ΔU = Q - W = 500 - 200 = +300 J. Heat absorbed increases U
work done by system decreases U.
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